Finding the Fourth Proportional to 6,411.24, 9,615.78 and 3,123.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.24 : 9,615.78 = 3,123.48 : x
2. Step 2: Convert to fraction form
   6,411.24/9,615.78 = 3,123.48/x
3. Step 3: Cross multiply
   6,411.24x = 9,615.78 × 3,123.48
4. Step 4: Simplify right side
   6,411.24x = 30,034,696.51
5. Step 5: Solve for x
   x = 30,034,696.51/6,411.24
6. Step 6: Final answer
   x = 4,684.69